Yttria-based refractory composition
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United States of America Patent
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Feb 12, 2013
Grant Date -
Dec 1, 2011
app pub date -
May 24, 2011
filing date -
May 15, 2007
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Abstract
Method for producing a mold for use in casting reactive metals comprising preparing a slurry of a yttria-based refractory composition and a binder, and using said slurry as a mold facecoat by applying said slurry onto a surface of a mold pattern, wherein said yttria-based refractory composition is obtainable by (a) mixing particles of a yttria-based ceramic material and a fluorine containing dopant, and (b) heating the resulting mixture to effect fluorine-doping of said yttria-based ceramic material.
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